Received a broken piano

After waiting weeks for this piano to arrive I opened it today and there is a key that doesn't work right in the middle of the piano. It works if you smash it with your hand but doesn't have any of the sensitivity that the other keys have. Obviously, this makes the product useless. I am very disappointed to have to return this product as I was excited to use it to finally learn the piano. I'd hope that a customer service person would get back to me quickly but that doesn't seem likely after reading the posts on this board. Oh well...